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In the GSB folder:

1. NRM_maps contains Bz data for NRM of all 19 zircons with age ≥3.5 Ga.  The number of the zircon is in the file name.  The variables "Bz" and "newLED" are the Bz field intensities and the visible light image over the same field of view, respectively.  Also included are .png images of the Bz maps, which can be regenerated from the Bz variable in the .mat files.  Each pixel in the Bz variable is 4.7x4.7 µm. 

2. IRM_maps contains the Bz data for IRM of 9 zircons subjected to this analysis.  File names contain the zircon number.  "Bz" variable contains the Bz field intensities, which is also ploted in the included .png files.  The visible light image of the same field of view is given by the .png file named LEDxx.png where xx is the zircon number.  Each pixel in the Bz variable is 4.7x4.7 µm. 

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In the JackHills folder:

Matlab files FOVxx.mat (xx between 1 and 30) contain Bz field intensities (variable Bz) and optical images over the identical fields of view (variable newLED).  Each pixel in the Bz variable is 4.7x4.7 µm. 

